Q: In this task, you are given a second sentence. Your task is to generate the first sentence on the same topic but incoherent and inconsistent with the second sentence.
However , this force was just to occupy their attention , for he sent a secondary army to surprise the Bulgar 's from the east by crossing the Ural mountains .
A:
The Mongols marched up the Volga river in a wide arc on the west side .